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Finding the Fourth Proportional to 80,541.72, 111,129.90 and 48,709.93

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Solution

The fourth proportional to 80,541.72, 111,129.90 and 48,709.93 is: 67,209.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,541.72 : 111,129.90 = 48,709.93 : x
  2. Step 2: Convert to fraction form
    80,541.72/111,129.90 = 48,709.93/x
  3. Step 3: Cross multiply
    80,541.72x = 111,129.90 × 48,709.93
  4. Step 4: Simplify right side
    80,541.72x = 5,413,129,649.91
  5. Step 5: Solve for x
    x = 5,413,129,649.91/80,541.72
  6. Step 6: Final answer
    x = 67,209.01

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.